Hello World

An error occurred while installing RedCloth (4.2.9), and Bundler cannot continue.
Make sure that gem install RedCloth -v '4.2.9' succeeds before bundling.

$ sudo gem install RedCloth -v '4.2.9' --verbose

rake aborted!
You have already activated rake 10.1.0, but your Gemfile requires rake 10.0.4. Prepending `bundle exec` to your command may solve this.
/Users/dongmeiliang/Documents/octopress/Rakefile:2:in `<top (required)>'
(See full trace by running task with --trace)

brew update
brew doctor
cd root_path_octopress
git pull octopress master
rm Gemfile.lock
vim Gemfile
gem 'rake', '~> 10.1.0'//改成合适的版本

dongmeiiangsmbp:octopress dongmeiliang$ rake generate
...
Build Failed

$ rake new_page[categories/iOS_Development]
// Edit source/ios-development/index.html, file's eventually content is:
---
layout: default
title: "iOS Development"
---
// Note: % has been escaped
{\% for post in site.posts \%}
    {\% if post.categories contains 'ios development' \%}
        {\% include archive_post.html \%}
    {\% endif \%}
{\% endfor \%}

$ vim source/_includes/custom/navigation.html
// Add follow content
<li><a href="/blog/categories/ios-development">iOS Development</a></li>

// When you write a post add follow contents to YAML head:
categories: [iOS Development]

Error fetching https://ruby.taobao.org/:
  too many connection resets (https://rubygems-china.oss.aliyuncs.com/specs.4.8.gz)

unset http_proxy
unset https_proxy
gem sources -a https://ruby.taobao.org

$ git clone -b source git@github.com:username/username.github.com.git octopress

$ cd octopress
$ git clone git@github.com:username/username.github.com.git _deploy

// From the first machine do the following whenever you’ve made changes:
$ rake generate
$ git add .
$ git commit -am "Some comment here."
$ git push origin source  # update the remote source branch 
$ rake deploy             # update the remote master branch

// Then on the other machine, you need to pull those changes.
$ cd octopress
$ git pull origin source  # update the local source branch
$ cd ./_deploy
$ git pull origin master  # update the local master branch

ERROR: While executing gem ... (Errno::EPERM)
Operation not permitted - /usr/bin/xcodeproj

$ sudo gem install cocoapods -n /usr/local/bin

// 1. Install the Ruby Version Manager rvm
$ curl -L https://get.rvm.io | bash -s stable

// 2. Reload environment variables
$ source ~/.rvm/scripts/rvm

// 3. Install the latest version of Ruby
$ rvm install 2.3.4

// 4. Check the version of Ruby
$ ruby -v

// 5. if current the version isn't your install just now, you can specific by command:
$ rvm use 2.3.4

// 6. If you want to set this latest version of Ruby as the default version
$ rvm --default use 2.3.4

$ gem install rake -v '12.3.3' --user-install -V

PATH="${HOME}/.gem/ruby/2.6.0/bin:${PATH}"

$bundle update
$bundle install